Law has drawn a distinction between what is termed an offer and what will be regarded as an invitation to treat
Fisher v Bell, Royal Pharmaceutical Society v Boots, Carlill v Carbolic Smoke Ball
This has created confusion as the differences are often very small
Goods in a shop window
they are regarded as being invitations to treat and not offers, this is confusing as it does not reflect what the public believes the law to be
Goods in a shop window- but
fisher v Bell are justified on the grouds the shops must be given the freedom to decide who they enter a contract with or not
if displays in a shop were regarded as offers then the shop keeper in the case of Fisher v Bell would have to sell the knife to any person accepting the offer even if they were underage
Goods on the shop shelf and public belief
generally the public believe that in a self service shop the goods on display can be bought there and then or if out of stock they will be provided for them at a later date
there is an issue with this as if it were an offer, as soon as they put it in their basket they accept that offer and therefore dont have the choice of putting it back
not possible to rectify errors in pricing either
in practical terms, invitation to treat appears to be a familiar with lawyers only
Advertisement and unilateral contracts
various pieces of legislations that deal with misleading adverts
therefore, under the law adverts are only significant if they actually lead to a contract
if this is the case, then the affected party is only left with a claim under misrepresentation
Only value left to the outcome of Carlill v Carbolic Smokeball is in reward cases